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Off-Grid Residential Solar

Off-grid residential solar — array and power wall
Array overview Combiner & rapid-shutdown Battery bank 48V LiFePO₄ Inverter/chargers split-phase
Off-GridSolar + Storage48VMPPTSplit-Phase
Overview

An off-grid residential system built to stay understandable years later, not just impressive on install day.

The system pairs roof and ground arrays with MPPT charge controllers feeding a 48V LiFePO₄ battery bank. Two inverter/chargers provide split-phase power for the house and handle generator charging when weather drags on. Every run is labeled, routed cleanly in tray or conduit, and landed on a power wall that makes troubleshooting obvious instead of miserable. Protection, disconnects, and service access were treated like part of the design, not cleanup work at the end.

Goal
Reliable off-grid power with clear maintenance paths and low standby losses.
Approach
Keep the architecture simple: 48V storage, MPPTs sized for array strings, split-phase inverter/chargers, and documented wiring.

Power you can live with: quiet, predictable, and easy to service when something trips or ages out.

At a Glance
Site
Private residence · High-sun, high-heat desert climate
Architecture
48V DC storage · split-phase AC via dual inverter/chargers
Generation
Roof + ground array · strings sized to MPPT window
Storage
LiFePO₄ battery bank with modular packs and proper BMS
Charge Control
MPPT charge controllers with remote monitoring
Backup
Auto/manual generator charge support
Protection
Rapid-shutdown, DC/AC disconnects, surge, fusing, bonding/grounding
Wiring
Shielded/UV-rated runs in conduit/tray · ferruled terminations · labeled both ends
Serviceability
Swing-space and slack loops for replacements · documented panel
Expandability
Spare breaker positions and controller capacity reserved
My Take

Off-grid should be boring in the best way—predictable daily harvest, quiet nights, and obvious troubleshooting when something blinks. I’d rather overspend on wire management and labeling than on novelty hardware. The result is a system you can hand to a future owner with confidence.

  • Documented from array to outlets—labels, torque specs, and a one-page single-line diagram.
  • Keep loops short and copper big; heat is the enemy in the desert.
  • Design for human hands: reachable disconnects, clean working clearances, and real strain relief.
What I’d Do Next
  • Weather-aware charge profiles tied to forecast and battery temperature.
  • Automatic load-shed for non-essentials during low SOC or generator starts.
  • Ground-mount expansion for winter sun angles and easier cleaning.
Highlights
Power Wall
  • Split-phase inverter/chargers with bypass and service disconnects
  • Neat tray routing, ferrules, and labeled terminations
  • Clear front-panel metering and remote monitoring
Array & Storage
  • Strings matched to controller voltage window
  • 48V LiFePO₄ packs with BMS and proper busbaring
  • Rapid-shutdown and surge protection upstream of controllers
Planning off-grid?

Let’s design something you can live with for 10+ years.

We’ll size for your loads, protect for your climate, and leave room for upgrades. I can help with design, parts, or a clean install plan.

Start a project

Contact

Thinking about an off-grid setup or upgrade? Send a note and I’ll get back to you right away.